“You think about what Abella’s gone through and she still has a positive attitude and wants to give back. Her character and outlook on life are simply amazing.”

Abella will make her Hollywood screen debut on Wednesday at a charity
movie showing on behalf of Soccer For Hope. Her mum Jamie, 35, said: “It is tough to see what Abella goes through and then see all the other children at the hospital.

“She loves to laugh and be joyful. Her one wish is for ‘all the children to be able to leave hospital’.”

Oliver had moved to Los Angeles to play in the West Coast soccer league when he was diagnosed with the blood disorder 15 years ago at 23.

After a bone marrow transplant, he recovered and decided to establish the Soccer For Hope charity to give something back.